Acroneuria magnifica Cao and Bae 2007

Acroneuria magnifica Cao and Bae, 2007 Material examined 1♂, CHINA: Yunnan Province, Tengchong County, Datang, Cizhuhe River, 1996.68 m, 22.777°N, 99.729°E, 8 May 2012, leg. Li Wen-Liang (CAU). Description Adult habitus. (Figure 7a, b) Three ocelli. General colour brown. Head slightly wider than pronotum; anterior ocellus much smaller than posterior ones; ocellate area with a large dark marking extending laterally, posterior margin of the marking with a narrow notch. Antenna dark brown, apical segments brown. Occiput yellow brown but laterally dark brown. Pronotum dark brown, medial portion brownish with distinct rugosities, anterior margin gently convex. Wing membrane subhyaline, veins dark brown. Leg brown, femorotibial joint darker and tarsi dark brown. Cercus uniformly brown. Male. Figures 7 and 8 Body length 26.8 mm; fore wing length 21.6 mm, hind wing length 19.3 mm. Tergum 9 (Figure 7c) with a few indistinct sensilla basiconica positioned in posteromedial field. Tergum 10 (Figure 7c) anteromedially interrupted, the slit separating two patches of sensilla basiconica, the patch positioned in posterior half of segment and covering half of segment width. Paraproct Figures 7 (c) and 8(c) strong, generally brown but with darker ventrolateral margin. In lateral view, the anterior edge nearly straight but apex gently incurved and ending in small apical tooth, posterior edge with more curved apex; in caudal view, the base moderately sclerotised and incised at inner edge, overally nearly straight (Figure 8c). Sternum 9 (Figure 8a) moderately elongated and with short, its posterior margin thickened and sclerotised, covering anterior part of sternum 10. Hammer (Figure 8a–b) large and elliptical, connecting the posterior margin of sternum 9 with a trapezoid sclerite, occupying one-fourth of segment width and barely one-fifth of segment length; the surface covered by dense, small but distinct granules. Cercus Figures 7 (a) and 8(a–c) each segment bears apical row of strong but short setae. Aedeagus. (Figure 8d–f) Complex with distinct armatures. Dorsal surface nearly bald but medially with a longitudinal spinulose ridge ending near apex. Ventral surface covered with dense small sharp spines. Basal portion of the everted aedeagus broken but the general outline of the spinous area is apparently column shaped. Remarks. This male is quite similar to the illustrations and original descriptions of A. magnifica Cao and Bae, 2007 from Vietnam, but the original illustrations are unclear and the aedeagus is not well everted (figs. 18–19 in Cao and Bae 2007), making identification difficult. We provided new illustrations and descriptions to facilitate the identification of this species.